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Accident # | 100769 |
State Police # | 07-3846 |
Accident Date | 2007-11-03 |
Report Date | 2007-11-09 |
Follow-up Date | 2007-12-28 |
Follow-up: | Yes |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Oil | 15d 23h 55m | external mixer on tank F-470 | NO | NO | NO | 275.1 gallons |
Accident Classified As: Reportable Quantity
"An external mixer on tank F-470 developed a leak due to a catastrophic bearing failure, which punctured the mixer's external case. In addition, seal failure allowed the head pressure of the tank to relieve through the damaged external case."
The release was not preventable through procedures, actions, or training because it was a sudden and unforeseeable failure.
Operations placed containment under leak site and collected spilled material via vacuum truck. The external case leak was sealed with expandable foam sealant that was pumped into the case cavity. Mixer was removed and replaced with a new one. Upon completion of repairs, excavation of visually stained soils with initiated. To prevent recurrence, plans are being implemented to move the mixer to a manway of sufficient height to prevent water impacting seal and bearing life. Finally, a formal preventative maintenance schedule will be adopted in conjunction with the current visual surveillance and operator rounds.
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